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1. Impacts of broadband and selected infrared wavelength treatments on inactivation of microbes on rough rice

Author:
Oduola, Abass A.; Bowie, Rebecca; Wilson, Shantae A.; Mohammadi Shad, Zeinab; Atungulu, Griffiths G.
Source:
Journal of food safety 2020 v.40 no.2 pp. e12764
ISSN:
0149-6085
Subject:
plate count,   etc   ; rough rice; tempering; wavelengths;     Show all 4 Subjects
Abstract:
... This study investigated the effects of broadband and selected infrared (IR) wavelength treatments of rough rice on microbial inactivation. Rough rice was treated at different IR wavelengths and product‐to‐emitter distances (110, 275, and 440 mm) followed by tempering at 60°C for 4 hr. The total mold and aerobic plate counts (APC) on non‐treated and treated samples were determined. Significant tota ...
DOI:
10.1111/jfs.12764

2. Culture medium brand choice impacts colony swarming behavior among industrial Bacillus isolates and the accuracy of aerobic plate counts

Author:
Gorsuch, John P.; LeSaint, Daniel; Jones, Zachary; Bielecki, Korey; Woodruff, Peyton
Source:
Journal of microbiological methods 2020 v.172 pp. 105891
ISSN:
0167-7012
Subject:
plate count,   etc   ; culture media; endospores; industry; technicians; variance;     Show all 6 Subjects
Abstract:
... Aerobic plate count assays are an industry standard method for the enumeration of microbial products. Colony swarming among industrial Bacillus isolates on solid medium can impact a counting technician's interpretation of colony count, promote inter-technician variance and reduce the agreement of plate counts with growth-independent enumeration methods. In the present study, we examined swarming b ...
DOI:
10.1016/j.mimet.2020.105891

3. In-situ monitoring of inactivation of Listeria innocua under high hydrostatic pressure using electrical conductivity measurement

Author:
Shynkaryk, Mykola V.; Pyatkovskyy, Taras; Yousef, Ahmed E.; Sastry, Sudhir K.
Source:
Journal of food engineering 2020 v.285 pp. 110087
ISSN:
0260-8774
Subject:
plate count,   etc   ; Listeria innocua; electrical conductivity; high pressure treatment; models; monitoring; temperature;     Show all 7 Subjects
Abstract:
... The effect of high hydrostatic pressure on electrical conductivity of samples of Listeria innocua ATCC 33090 bacterial suspension (~10¹⁰ CFU/ml) was investigated, to determine if its inactivation could be monitored via such measurements. HHP treatment was applied at 300, 400 and 500 MPa, and the electrical conductivity, temperature and pressure were continuously recorded during experiments. Microb ...
DOI:
10.1016/j.jfoodeng.2020.110087

4. Shelf life extension of sugarcane juice by cross flow hollow fibre ultrafiltration

Author:
Panigrahi, Chirasmita; Mondal, Mrinmoy; Karmakar, Sankha; Mishra, Hari Niwas; De, Sirshendu
Source:
Journal of food engineering 2020 v.274 pp. 109880
ISSN:
0260-8774
Subject:
plate count,   etc   ; Reynolds number; enzymes; juice quality; molecular weight; polyphenols; shelf life; sucrose; sugarcane juice; ultrafiltration;     Show all 10 Subjects
Abstract:
... Pre-treated sugarcane juice was ultrafiltered using polysulphone based hollow fiber to enhance its shelf life. The membrane of molecular weight cut off 30 kDa was selected based on productivity, quality and microbial safety of the product. Optimum condition was found as 104 kPa transmembrane pressure and 30 l/h cross flow rate (Reynolds number 249) based on flux yield and desirable juice quality. ...
DOI:
10.1016/j.jfoodeng.2019.109880

5. Production of acetaldehyde from ethanol in coastal waters

Author:
de Bruyn, Warren J.; Clark, Catherine D.; Senstad, Mary
Source:
Environmental science and pollution research international 2020 v.27 no.11 pp. 12673-12682
ISSN:
0944-1344
Subject:
plate count,   etc   ; acetaldehyde; bacteria; biodegradation; biological production; coastal water; dissolved organic matter; ethanol; gasoline; photochemistry; California;     Show all 11 Subjects
Abstract:
... Interest in understanding the cycling of ethanol in the environment has grown as ethanol use as a gasoline additive has increased. The production of acetaldehyde from ethanol was measured in Southern California coastal seawater. The rate of increase of acetaldehyde was positively correlated with the rate constant for ethanol biodegradation and bacteria count and was consistent with two consecutive ...
DOI:
10.1007/s11356-020-07880-8

6. Top-down evaluation of the matrix effects in microbial enumeration test uncertainty

Author:
Dias, Francielle Regina Silva; Lourenço, Felipe Rebelo
Source:
Journal of microbiological methods 2020 v.171 pp. 105864
ISSN:
0167-7012
Subject:
plate count,   etc   ; anti-infective agents; asymmetry; drugs; microbial contamination; microorganisms; preservatives; uncertainty; uncertainty analysis;     Show all 9 Subjects
Abstract:
... Microbial contamination may compromise the efficacy and safety of pharmaceutical products. Microbial enumeration tests are required by most of the pharmacopeial compendia and consist in conventional pour-plate inoculation of a sample aliquot followed by incubation under appropriate conditions. Despite of this, the measurement uncertainty evaluation for microbial enumeration tests is rarely conside ...
DOI:
10.1016/j.mimet.2020.105864

7. Laboratory handling practice for faecal microbiota transplantation

Author:
Quaranta, G.; Fancello, G.; Ianiro, G.; Graffeo, R.; Gasbarrini, A.; Cammarota, G.; Sanguinetti, M.; Masucci, L.
Source:
Journal of applied microbiology 2020 v.128 no.3 pp. 893-898
ISSN:
1364-5072
Subject:
plate count,   etc   ; anaerobes; emulsions; feces; gastrointestinal system; guidelines; intestinal microorganisms; magnetic materials; microbial load; thawing;     Show all 10 Subjects
Abstract:
... AIMS: Faecal microbiota transplantation (FMT) consists of the infusion of faeces from a healthy donor to the gastrointestinal tract of a recipient patient to treat disease associated with alterations in gut microbiota. The objective of this article was to describe laboratory workflow of an FMT laboratory to provide tips for preparing the faecal suspensions to be infused. METHODS AND RESULTS: Twent ...
DOI:
10.1111/jam.14522

8. Spatio-temporal characterisation of bioaerosols at diverse outdoor land-use sites in an urban environment

Author:
Balyan, Palak; Ghosh, Chirashree; Das, Shukla; Banerjee, B. D.
Source:
Aerobiologia 2020 v.36 no.1 pp. 77-81
ISSN:
0393-5965
Subject:
plate count,   etc   ; bacteria; bioaerosols; fungi; land use; relative humidity; statistical models; temperature; tropics; urban areas;     Show all 10 Subjects
Abstract:
... The land-use configuration has huge impact on emission sources and also a major influencing factor, which ultimately determine the microbial count, composition and seasonal dynamics of bioaerosols at respective site. Despite this, very few studies compare bioaerosols exposure at different land-use sites. The aim of the present study was to measure and compare the aerosolised bacterial and fungal c ...
DOI:
10.1007/s10453-019-09582-2

9. Aerobic plate count, Salmonella and Campylobacter loads of whole bird carcass rinses from pre-chillers with different water management strategies in a commercial poultry processing plant

Author:
Blevins, Rachael E.; Feye, Kristina M.; Dittoe, Dana K.; Bench, Lara; Bench, Bennie J.; Ricke, Steven C.
Source:
Journal of environmental science and health 2020 v.55 no.2 pp. 155-165
ISSN:
1532-4109
Subject:
plate count,   etc   ; Campylobacter; Salmonella; birds; meat processing plants; pathogens; poultry; public health; tanks; temperature; water management;     Show all 11 Subjects
Abstract:
... Salmonella and Campylobacter are significant issues for poultry processors because of increasing regulatory standards as well as public health concerns. The goal of this study is to report the effects of two different pre-chiller systems that utilize different temperatures and water recirculation systems on whole bird carcass rinsates. Both pre-chiller tanks were contained within a single poultry ...
DOI:
10.1080/03601234.2019.1670522

10. Nisin-Based Organic Acid Inactivation of Salmonella on Grape Tomatoes: Efficacy of Treatment with Bioluminescence ATP Assay

Author:
Berrios-Rodriguez, Armarynette; Ukuku, Dike O.; Olanya, Modesto; Cassidy, Jenifer; Orellana, Lynette E.; Mukhopadhyay, Sudarsan; Niemira, Brendan A.
Source:
Journal of food protection 2020 v.83 no.1 pp. 68-74
ISSN:
0362-028X
Subject:
plate count,   etc   ; Salmonella; adenosine triphosphate; antimicrobial properties; bioluminescence; grape tomatoes; in vitro studies; peptones; sanitizers;     Show all 9 Subjects
Abstract:
... The antimicrobial activity of a new nisin-based organic acid sanitizer (NOAS), developed in our laboratory, was tested against viable aerobic mesophilic bacteria and Salmonella populations inoculated on produce surfaces. The activity of NOAS was compared with 200 ppm of chlorinated wash water and a bioluminescence ATP technique to determine the efficacy of treatments compared with plate count meth ...
DOI:
10.4315/0362-028X.JFP-19-275

11. Designing an aptamer based magnetic and upconversion nanoparticles conjugated fluorescence sensor for screening Escherichia coli in food

Author:
Li, Huanhuan; Ahmad, Waqas; Rong, Yawen; Chen, Quansheng; Zuo, Min; Ouyang, Qin; Guo, Zhiming
Source:
Food control 2020 v.107 pp. 106761
ISSN:
0956-7135
Subject:
plate count,   etc   ; Escherichia coli; adulterated foods; crystal structure; detection limit; fluorescence; magnetism; nanoparticles; oligonucleotides; pork; screening;     Show all 11 Subjects
Abstract:
... The study assembles a highly sensitive upconversion fluorescence sensor for screening Escherichia coli (E. coli) in food. The principle of the strategy was based on the specific matching between two aptamers embedded magnetic nanoparticles (MNPs) and cDNA-upconversion nanoparticles (UCNPs). The fluorescence emission intensity of the MNPs-aptamer-cDNA-UCNPs conjugate system gradually decreased upon ...
DOI:
10.1016/j.foodcont.2019.106761

12. Bifidobacterium animalis ssp. lactis BB-12 enumeration by quantitative PCR assay in microcapsules with full-fat goat milk and inulin-type fructans

Author:
Verruck, Silvani; Silva, Kelly Justin; de Oliveira Santeli, Helena; Scariot, Mirella Christine; Venturelli, Gustavo Luiz; Prudencio, Elane Schwinden; Arisi, Ana Carolina Maisonnave
Source:
Food research international 2020 v.133 pp. 109131
ISSN:
0963-9969
Subject:
plate count,   etc   ; Bifidobacterium animalis subsp. lactis; DNA; fructans; goat milk; milk; oligodeoxyribonucleotides; probiotics; quantitative polymerase chain reaction; spray drying;     Show all 10 Subjects
Abstract:
... The current study was conducted to develop a quantitative polymerase chain reaction (qPCR) assay for Bifidobacterium animalis ssp. lactis BB-12 quantification in microcapsules matrix with full-fat goat milk and inulin-type fructans. DNA was isolated from milk, feed solutions (before spray drying) and microcapsules (after spray drying) using DNAzol. Two primer pairs targeting Bal-23S or Tuf sequenc ...
DOI:
10.1016/j.foodres.2020.109131

13. Study of biological up-flow roughing filters designed for drinking water pretreatment in rural areas: using ceramic media as filter material

Author:
Zeng, Jie; Chen, Sheng; Wan, Kun; Li, Jinmei; Hu, Dong; Zhang, Shenghua; Yu, Xin
Source:
Environmental technology 2020 v.41 no.10 pp. 1256-1265
ISSN:
1479-487X
Subject:
plate count,   etc   ; absorbance; ammonium nitrogen; ceramics; drinking water; filters; rural areas; rural water supply; turbidity; water utilities;     Show all 10 Subjects
Abstract:
... Roughing filters have been successfully employed as a pretreatment method in rural water supply, but few studies have reported the performance of up-flow roughing filters (URFs) packed with ceramic media. In this study, two pilot-scale URFs filled with ceramic media were designed. Filter performance, height profiles and head loss development were fully investigated. The average DOC, UV₂₅₄ absorban ...
DOI:
10.1080/09593330.2018.1530304

14. Dialysis as a new pre-treatment technique for online bacterial counting

Author:
Fujioka, Takahiro; Boivin, Sandrine
Source:
The Science of the total environment 2020 v.714 pp. 136768
ISSN:
0048-9697
Subject:
plate count,   etc   ; bacteria; dialysis; drinking water; molecular weight; organic compounds; recycled water; ultrafiltration; wastewater; wastewater treatment; water reuse;     Show all 11 Subjects
Abstract:
... Real-time bacteriological counting technology is capable of providing an online profile of bacterial removal during the wastewater treatment process, and can enhance the safety of recycled water for potable water reuse. However, autofluorescence emanating from dissolved organic compounds present in treated wastewater interferes with the analysis. In this study, a novel approach is adopted, viz., d ...
DOI:
10.1016/j.scitotenv.2020.136768

15. Designing Photocatalytic Nanostructured Antibacterial Surfaces: Why Is Black Silica Better than Black Silicon?

Author:
Singh, Jagriti; Jadhav, Shubham; Avasthi, Sushobhan; Sen, Prosenjit
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20202-20213
ISSN:
1944-8252
Subject:
plate count,   etc   ; antibacterial properties; bacteria; coatings; finite element analysis; methylene blue; nanomaterials; photocatalysis; photocatalysts; reactive oxygen species; silica; silicon;     Show all 12 Subjects
Abstract:
... The efficiency of photocatalytic antibacterial surfaces is limited by the absorption of light in it. Light absorption in photocatalytic surfaces can be enhanced by structuring it, leading to increased generation of reactive oxygen species (ROS) and hence improved bactericidal efficacy. A second, more passive methodology to kill bacteria involves the use of sharp nanostructures that mechanically di ...
DOI:
10.1021/acsami.0c02854

16. Optimization of a propidium monoazide-qPCR method for Escherichia coli quantification in raw seafood

Author:
Miotto, Marilia; Barretta, Clarissa; Ossai, Sylvia O.; da Silva, Helen Silvestre; Kist, Airton; Vieira, Cleide Rosana Werneck; Parveen, Salina
Source:
International journal of food microbiology 2020 v.318 pp. 108467
ISSN:
0168-1605
Subject:
plate count,   etc   ; Escherichia coli; cell suspension culture; food matrix; light intensity; oysters; propidium; quantitative polymerase chain reaction; raw seafoods;     Show all 9 Subjects
Abstract:
... The present study compared different concentrations of propidium monoazide (PMA), time of exposure to light and different light intensities to determine the optimal conditions for the quantification of viable Escherichia coli in cell suspension and in food matrix. The influence of cell density and the effectiveness of PMA in viable but non-culturable (VBNC) E. coli cells were evaluated and also ap ...
DOI:
10.1016/j.ijfoodmicro.2019.108467

17. Development of an innovative induction heating technique for the treatment of liquid food: Principle, experimental validation and application

Author:
Wu, Shilin; Yang, Na; Jin, Yamei; Li, Dandan; Xu, Yue; Xu, Xueming; Jin, Zhengyu
Source:
Journal of food engineering 2020 v.271 pp. 109780
ISSN:
0260-8774
Subject:
plate count,   etc   ; electric field; electric potential difference; energy efficiency; engineering; food industry; grapefruit juice; heat; magnetism; raw milk;     Show all 10 Subjects
Abstract:
... The novel, previous unreported induction heating technique developed here uses the inverse process of the existing induction heating techniques. The theoretical basis for developing this technique is to determine whether the induced current passing through a winding food coil would induce a magnetic flux or cause an increase in primary current. Therefore, to develop this technique and implement it ...
DOI:
10.1016/j.jfoodeng.2019.109780

18. A polar stationary phase obtained by surface-initiated polymerization of hyperbranched polyglycerol onto silica

Author:
Geng, Huiliang; Jing, Jie; Zhang, Feifang; Zhang, Feng; Yang, Bingcheng
Source:
Talanta 2020 v.209 pp. 120525
ISSN:
0039-9140
Subject:
plate count,   etc   ; amino acids; aromatic acids; carbohydrates; hydrogen bonding; hydrophilic interaction chromatography; nucleosides; polymerization; silica; water-soluble vitamins;     Show all 10 Subjects
Abstract:
... A novel polar stationary phase for hydrophilic interaction chromatography (HILIC) is prepared by surface-initiated polymerization of hyperbranched polyglycerol onto silica. Such polymerization offers an easy way to tune the cabon load. The stationary phase showed obvious hydrogen bonding interaction and typical HILIC character, exhibiting nealy-universal separation ability towards polar analytes. ...
DOI:
10.1016/j.talanta.2019.120525

19. A rapid chair‐side method for the estimation of oral bacterial colonization density

Author:
Ledder, R.G.; Latimer, J.; Buzza, K.M.; Haddad, G.S.; Wilson, R.A.; Sreenivasan, P.K.; McBain, A.J.
Source:
Journal of applied microbiology 2020 v.128 no.3 pp. 884-892
ISSN:
1364-5072
Subject:
plate count,   etc   ; Streptococcus; anaerobes; bacteria; bacterial colonization; citizen participation; color; humans; milk; milkshakes; mouth; periodontal diseases; rapid methods; viability; volunteers;     Show all 15 Subjects
Abstract:
... AIMS: Caries and periodontal disease are associated with inadequate control of oral bacteria. Since conventional microbiological evaluations are impractical in dental clinics or public engagement activities, a rapid test for the quantification of oral bacteria represents a useful tool. We describe the development of a colour change test to rapidly estimate bacterial colonisation density in the mou ...
DOI:
10.1111/jam.14529

20. Coupling changes of disinfectant and bacteria induced by the water stagnation and disinfection strategy

Author:
Chen, Xiao; Wang, Yi; Li, Weiying; Zhang, Junpeng; Qi, Wanqi; Lu, Yaofeng; Ding, Zhibin
Source:
Chemosphere 2020 v.242 pp. 125190
ISSN:
0045-6535
Subject:
plate count,   etc   ; bacteria; byproducts; chlorine; disinfectants; disinfection; kinetics; membrane potential; microbiome; models; organic matter; tap water; water distribution;     Show all 13 Subjects
Abstract:
... This paper studied stagnation-induced changes of disinfectant and bacteria using an orthogonal test and kinetic analysis, and then proposed a disinfection strategy. Tap water from a drinking water distribution system and ultrafiltrated water were collected and disinfected with four disinfectants (concentrations were set 0.2–1 mg/L as Cl₂. The study had several findings. First, disinfectants expand ...
DOI:
10.1016/j.chemosphere.2019.125190